Swivel attachment plug



Nov. 3o 192s. 1,609,230

C.' E.,WARNER swIvEL ATTACHMENT PLUG Filed Nov. 1 1920 2 Sheets-Sham INov. 30,1926. 1,609,230 C. E. WARNER swzvsn ATTAGHMENT PLUG FiledNov. 1. 1920 2 sheets-sheet a Fig. 8;

Patented Nov. 30, 1926.

CHESTER E. W'ARNER, 0F BERWYN, ILLINOIS,

MANUFACTURING COMPANY, OF CHICAGO,

ASSIGNOR TO BENJAMIN ELECTRIC ILLINOIS, A CORPORATION OF ILLINOIS.

SWIVEL ATTACHMENT PLUG.

Application led November 1, 1920. Serial No. 420,909.

My invention relates to .electrical connector devices, and moreparticularly to swivel attachment plugs.

One of the objects of my invention is to provide an improved swivelattachment plug which will be durable and efficient in use, easy to wireand cheap to manufacture..

Further objects will appear from the detailed description to follow andfrom the appended claims.

In the drawings in which two embodiments of my invention are shown Fig.1 is a side elevation of a swivel shell attachment plug;

Fig. 2 is a top plan view of the plug shown in Fig. 1 on an enlargedscale;

Fig. 3 is an axial section on the line 3 8 of Fig. 2;

Fig. 4 is substantially a section on the line 4 4 of Fig. 3 but showingthe plug wired' Fig. 5 is a perspective view of the sliding contact;

Fig. 6 is a side elevation of another form of attachment plug embodyingmy invention;

Fig. 7 is a plan view ofthe plug shown in Fig. 6;

Fig. 8 is an aXial section on the line 8 8 of Fig. 7;

Fig. 9 is substantially an axial section on the line 9 9 of Fig. 7 butshowing the plug not wired;

Fig. 1() is a view on the line 10 10 of Fig. 11 is a view on theline 1111 of Fig. 8; and

Fig. 12 is a detail perspective view of the sliding cont-act member.

Referring yto the construction shown in Figs. 1 .to 5 inclusive, thiscomprises va swivel shell attachment plug 15, in lwhich both of thebinding terminals are located outside the threaded shell contact at the7 entering end of the plug, and in which both of the wires are securedin place by the same operation.

yThe plug 15 comprises a threaded shell contact 18, a center Contact 19,an insulating handle member 2O securedv to the threaded shell contact`18, a binding terminal construction 21 forl securing the wires 16 and17, a sliding cont-act member 22, Vfor swivel or sliding engagement withthe threaded shell contact 18, whereby the threaded shell Contact 18 canbe rotated without twistingl the cords 16 and 17, an insulating base 28,for supporting the center contact 19, the sliding contact member 22, andthe wiring terminal construction 21 and insulating the parts withrespect to each other, and an insulating spacer or washer 24 forinsulating the wires 16 and 17 from each other, and

forming part of the binding terminal construction 21.

The threaded shell contact 18 has an in wardly extending annular iiange25, which extends into a corresponding rabbet or recess 26 in theinsulating base 23, the sliding contact member 22 having wing portionsoverlying the inwardly extending flange 25,

f which is connected with thesliding contact member 22, the sli dingcontact member 22 is provided with an opening 27 in the wing portion 28through which the'end of the conductor 17 is led to its bindingterminal. In order to position the sliding contact member 22, theinsulating base 23 is provided with three bosses 29, 30 and V31 (Fig. 2)which straddle the sliding contact member 22 and prevent it fromrotating with respect to the insulating base 23.

The wiring terminal construction 21 comprises the insulating button orspacer 24 heretofore referred to, between which andthe slidingk contactmember 22 the conductor 27 is clamped, and the'ce'nter contact screw 32,between which and the spacer 24 the end of the conductor 1:6 isclamped,this center contact screw 32 being threaded into a. nut 32aembedded in the insulating base 23.

The. upper face of the insulating button 24` is dishedslightly to afforda depression to receive the-end-of Vthe conductor 27, in whichdepression the conductor is clamped by the head of the center Contactscrew 32.

In order` to keep the bared end of the wire yp p screw 32 is loosenedup, the bared end ot the` wire 17 is wrapped around underneath the insililating'spacer '2st, theba'red end of the wire 16 is wrappedaroundunderneath the center'contact screw 3Q, and the center con# tactscrew 3Q is then madeto clamp both ot theconductors 16 and 17 by aSingle operation.

ln screwing the pluginto a socket, the insulating base and slidingcontact member 2&2 do not rotate but the threadedshell Contact 18,beingswiveled with respect to the'wirin'g terminals, can bev screwedinto the socket without twisting the cord.

The construction shown in Figs. 6 `to 12 inclusive, comprises a threadedshell contact 40, acenter contact l1, an insulatingV handle member l2(which maybe of wood it desired) secured to the threaded shell contact40, a wiring terminal construction 43 for clamping both ot theconductors all and l5 by a single operation, a sliding contact memberL16 having a sliding or swivel engagement with respect to said shellcontact L10', an insulating'base 47, andan insulating cap' e8 forSupporting the wiringterminal construction e3, the center Contact 41 andthe sliding Contact a6 intheir proper relative position with respect toeach other. The inwardly extending flange 49 of the threaded shellcontact-'110 is located between thel insulating base L17 and the cap 18,whereby relative endwise movement is prevented', the sliding'contact i6also being held 1n place between the base i7 and cap i8 andjinjslid-`ing engageinentwith the inwardlT extending flange 12X This slicingcontactnnember 4,6 maj,7 be a sheet metal stamping having an arcuatetlanfe port-ion 50 which slidably en gages the inwardlj,vventendin-gliangeflf, havingk an annular depressed portion 5 1 in whichthe end ot the conductor-45 lies, and` having a'plurality of' uprvfardlyextending 52rwhich entendinto'recessesr in the insulating? cap .toposition the slidingc on-j tact" member, 416 with vrespect tothecap 4 8and base l? and preventrelative lrotation therebetween. ri'hese'upwardly' extending lugs/52 also serve to help confine the bared end offthe conductor e5' and keep it away from the cei f contact screw.. Y

The'infsulatingbase 17 and cap` 8 are. centered with respect to eachother and prevented from relative rotation by means of an upwardlyextending annular boss 54 on the insulating base i7, this boss 54-having a laterally1 extending wing portion 55, the cap L18 beingprovided with a corresponding recess to receive the annular boss 5&1with its lateral'extension 55, whereby the parts are centered topreventrelative rotation.

The binding terminal construction 4.3 comprises,v in additionto the headof the center contact screw 56, a dish-shaped sheet metal stamping 57,between which and the head ot the center contact screw 56, the-bared endot' the wire 411 is clamped. The binding terminal construction @i3comprises also the insnlatingbutton or cap- 4&3, between which.

and the sliding-,contact ettthe bared end ol? the conductor V45 ,isclamped. This Aclamping action is ell'ectedby means oi: the centercontactrscreiv 56 which isjthreadedinto ametal bushing 56, embedded inthe insulating base l?. The sheet metal stainping57is held in place onthe insulating cap l-.8 bvl means ot' a. tongue portion 59 bent-'over aportion of the cap. The insulating base 4:7 and'cap i8 are provided withregistering openings 60 and 61 ,respectiveliY for t-he passage ot thewire L14 to the binding terminal. The insu lating base e7 and cap 118are provided with registering openings 62" and 63 respectively, foi-.thepassage ot the teedjvire 45.

The wiring and operation 'ot' the device is substantially the same as inthe torni previously described7 the screw eil being loosened, in wiring,suiiiciently to permit the end of the conductor l5 to be wrapped aroundbetween the sliding contact li6 and capa-S, and toj permit the end ofthe conductor all to be wrapped around'between the cup-shaped member 57jand the head ot the binding screw 56. The screw 56 isthen tightened downto clamp-both the conductors le and 415 at' one opera-tion'.

Having thus described my invention, what l claim as new and desire tosecure by Letters Patent ot the United States is:

1.1311. swivel attachment plug` comprising a center contact, a shellcontact, a sliding contact member swiveled with respect to said shellconact, and a wiring terminal construction for securing a pair ot wirescomp-risingan insulating washer, between which andsgiidsliding Contactone of the wiresis helchand Aa screw between the head o' .\vhich andsaid washer the-'other wire is held.

el attachment plug comprising a ct, a shell Contact, an insnlat l@contact mounted on sai insul ly engaging said shell'conf washer betweenwhich andY said slidingcontact one of the wires is held,angl acer rContact screw between which and the insulating washer the other Wire isheld.

3. A swivel attachment plug comprising tween which and the insulatingWasher the a center Contact, a shell Contact, an insuother Wire is held,said Center Contact screw latlng base, a sliding Contact mounted onserving to hold said Washer and sliding eon- O Said insulating hase,slidably engaging said tact in place on said insulating hase. shellContact, an insulating Washer between In Witness whereof, I havehereunto suhwhich and said sliding Contact one of the scribed my naine.

vivire is held, and a center Contact screw be- CHESTER E. WARNER,

